30 Questions
What is the characteristic of thin skin?
It usually contains hair
Which cell type is responsible for skin pigmentation?
Melanocytes
What is the main cause of Squamous Cell Carcinoma?
Chronic sun exposure
Which of the following is NOT a function of skin?
Digestion
What is the outermost layer of the skin?
Epidermis
What type of cancer arises in pigment cells of the skin?
Melanoma
Where is thick skin typically found?
Palms and soles of feet
What is the function of sebum, a secretion of sebaceous glands?
To waterproof skin
What type of secretion do sebaceous glands produce?
Holocrine
Where are sebaceous glands most numerous?
On the face, scalp, forehead, and upper thorax
What is a common skin condition that usually begins in adolescence?
Acne vulgaris
What is the thinnest part of the dermis?
Papillary layer
What type of cancer is the most common in Australians under fifty years of age?
Melanoma
What is the thickness of the dermis in the palms and soles of the feet?
~3mm
What is the primary function of eccrine sweat glands?
Regulating body temperature through thermoregulation
Where are apocrine glands typically located in the body?
Primarily in the axilla, anal region, and areola of nipple
What type of cells form a margin around the secretory units of eccrine glands?
Myoepithelial cells
What is the composition of sweat initially secreted by eccrine glands?
Water, sodium, and potassium ions
What happens to the ions in sweat as it reaches the surface of the skin?
They are absorbed by the epithelial lining
What is the characteristic of the secretion produced by apocrine glands?
It is viscous and odourless
Where are eccrine glands most abundant in the body?
Primarily on the forehead, axillae, palms, and soles
What triggers the sebaceous glands to produce more sebum?
Hormonal changes during puberty
What is the main cause of acne vulgaris?
Hormonal imbalance
What blocks the hair follicle and leads to acne?
Dead skin cells
What contributes to the inflammation in acne?
Bacteria accumulation
What happens to the sebaceous glands during puberty?
They respond to androgens by producing more sebum
What is the result of the skin cells not being shed normally?
Whitehead formation
What is the role of stress in acne development?
It increases androgen production
What is the term for the plug that forms in the hair follicle?
Comedone
What is the genetic contribution to acne development?
Hereditary factors contribute, but the exact mechanism is unknown
Test your knowledge of the skin's functions, including protection, regulation of body temperature, excretion, absorption, and reception. Learn about the classification of skin into thick and thin types, and regional variations in texture.
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